faction-plugin-coding-coach

Coding Coach

Staff Engineer Practice

Practice algorithm katas and code review exercises 1:1 with a staff-engineer coach. Explain your approach, get scored against a hidden rubric, survive the follow-ups. The coach has seen every PR you're about to open and every bug you're about to write.

At a glance

// 10 katas · 6 code reviews

// Hidden rubric scoring

// 11 achievements · run history

// 1:1 with Staff Engineer

Install

faction plugin install faction-plugin-coding-coach

// Slash command: /coach

Highlights

▸ 10 algorithm katas (linked lists, trees, DP, etc.)
▸ 6 code review exercises (retry logic, migrations, races, caching)
▸ Hidden rubric scoring with 3-5 points per problem
▸ Follow-up prompts the coach can push with
▸ 1:1 delivery (not panel-style like Interview Prep)
▸ 11 achievements including Kata and Review completionist tracks
▸ Run history with per-mode round tracking

Katas

· Reverse a Linked List
· Detect a Cycle in a Linked List
· Validate a Binary Search Tree
· Longest Palindromic Substring
· Merge K Sorted Lists
· Implement an LRU Cache
· Kth Largest Element
· Serialize/Deserialize a Binary Tree
· Word Ladder (BFS)
· Coin Change (DP)

Code review exercises

· Adding retry logic (pitfalls: fixed delay, no idempotency)
· Database migration (50M-row ALTER TABLE at scale)
· Function cleanup (200-line refactor — is it actually better?)
· API with a hidden race condition
· Brittle test suite (exact string matches, timestamps)
· New caching layer (thundering herd, staleness)

Quickstart

$ /coach start kata

$ /coach answer I'd use the three-pointer iterative approach...

$ /coach status

$ /coach synthesis

$ /coach history

$ /coach achievements

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